/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hdds.scm.node;

import org.apache.hadoop.hdds.protocol.DatanodeDetails;

import java.util.Set;

/**
 * Interface used by the DatanodeAdminMonitor, which can be used to
 * decommission or recommission nodes and take them in and out of maintenance.
 */
public interface DatanodeAdminMonitor extends Runnable {

  void startMonitoring(DatanodeDetails dn);
  void stopMonitoring(DatanodeDetails dn);
  Set<DatanodeDetails> getTrackedNodes();

}
